Submission #741662

#	Time	Username	Problem	Language	Result	Execution time	Memory
741662		bane	Friend (IOI14_friend)	C++17	100 / 100	31 ms	8032 KiB

friend

#include "friend.h"
#include<bits/stdc++.h>
#define              ALL(v)  (v).begin(), (v).end()
#define           REP(i, n)  for (int i = 0, _n = (n); i < _n; ++i)
#define          REPD(i, n)  for (int i = (n); i--; )
#define        FOR(i, a, b)  for (int i = (a), _b = (b); i < _b; ++i) 
#define       FORD(i, b, a)  for (int i = (b), _a = (a); --i >= _a; ) 
#define       FORE(i, a, b)  for (int i = (a), _b = (b); i <= _b; ++i) 
#define      FORDE(i, b, a)  for (int i = (b), _a = (a); i >= _a; --i) 
using namespace std;
template <class A, class B> bool maximize(A &a, B b)  { if (a < b) { a = b; return true; } return false; }
int findSample(int n, int confidence[], int host[], int protocol[]){
	vector <vector <int>> dp(n, vector<int>(2, 0));
	REP(i,n)dp[i][1] = confidence[i];
	FORD(i,n,1){
		if (!protocol[i]) {
			dp[host[i]][0] += max(dp[i][0], dp[i][1]);
			dp[host[i]][1] += dp[i][0];
		} else if (protocol[i] == 1) {
			dp[host[i]][1] += max(dp[i][0], dp[i][1]);
			maximize(dp[host[i]][1], dp[host[i]][0] + dp[i][1]);
			dp[host[i]][0] += dp[i][0];
		} else {
			dp[host[i]][1] += dp[i][0];
			maximize(dp[host[i]][1], dp[host[i]][0] + dp[i][1]);
			dp[host[i]][0] += dp[i][0];
 
		}
	}
	return max(dp[0][0], dp[0][1]);
}

• Subtask 1: 11 / 11
• Subtask 2: 8 / 8
• Subtask 3: 8 / 8
• Subtask 4: 19 / 19
• Subtask 5: 23 / 23
• Subtask 6: 31 / 31